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Expired European patentEurope

Positive-working photosensitive composition containing a dye and positive-working photosensitive recording material prepared from this composition

EP 0312950 B1 · Applicant: HOECHST AKTIENGESELLSCHAFT

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed October 17, 1988 and granted January 4, 1995. A European patent lasts at most 20 years from filing, so its term ended October 17, 2008.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by April 17, 2014.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledOctober 17, 1988
PublishedApril 26, 1989
GrantedJanuary 4, 1995
Term endedOctober 17, 2008
Application numberEP 88117219
Classification (CPC)G03F7/091

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedOct 17, 1988PublishedApril 26, 1989Patent grantedJan 4, 1995Term endedOct 17, 2008

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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